Fast fault recovery depends on immediate detection of occurred fault. In some case, it is rather difficult to determine the cause of a fault in order to provide fast fault restoration/isolation. Also, service level fault, such as Service Level Agreement (SLA) violation may not be due to physical device failure. This paper explores in detail the aspects of service level fault detection. We present the design and implementation of service level fault detection mechanism with SLA in WBEM-based inter-AS traffic engineering (TE). We changed existing Service Location Protocol (SLP) based service discovery mechanism to Universal Plug and Play (UPnP) based one, and extended existing providers with new UPnP Provider which has not been supported by OpenPegasus WBEM. We also designed DMTF MOF (Managed Object Format) for service discovery for SLA management in order to handle service violation. UPnP Event Notification mechanism, service violation handling, and C++ based provider implementation on OpenPegasus WBEM for inter-AS TE is explained in detail.